Index: README.md
===================================================================
--- README.md	(revision 951e451f822f146ef5fabfed0bec74bc29b5e20c)
+++ README.md	(revision 2f24a8e3751b5670c964a834d6c1b45e53db8f03)
@@ -54,5 +54,5 @@
 
 ```
-$ sudo apt-get install build-essential libgmp-dev libmpfr-dev ppl-dev libmpc-dev zlib1g-dev texinfo libtinfo-dev xutils-dev
+$ sudo apt-get install build-essential libgmp-dev libmpfr-dev ppl-dev libmpc-dev zlib1g-dev texinfo libtinfo-dev xutils-dev flex bison
 ```
 
@@ -61,5 +61,5 @@
 ```
 # sudo dnf group install 'Development Tools'
-# sudo dnf install wget texinfo libmpc-devel mpfr-devel gmp-devel PyYAML genisoimage
+# sudo dnf install wget texinfo libmpc-devel mpfr-devel gmp-devel PyYAML genisoimage flex bison
 ```
 In case the toolchain script won't work no matter how hard you try, let us know.